Catel.MVVM.Providers.WindowLogic.OnViewModelClosedAsync C# (CSharp) Метод

        public override async Task OnViewModelClosedAsync(object sender, ViewModelClosedEventArgs e)
        {
            if (_closeInitiatedByViewModel == null)
            {
                _closeInitiatedByViewModel = true;
                _closeInitiatedByViewModelResult = e.Result;
            }

            await base.OnViewModelClosedAsync(sender, e);

#if SILVERLIGHT
            if (TargetWindow is ChildWindow)
            {
                // This code is implemented due to a bug in the ChildWindow of silverlight, see:
                // http://silverlight.codeplex.com/workitem/7935

                // Only handle this once
                if (_isClosed)
                {
                    return;
                }
            }
#endif

            if (_closeInitiatedByViewModelResult != null)
            {
                bool result;
                try
                {
                    result = PropertyHelper.TrySetPropertyValue(TargetWindow, "DialogResult", _closeInitiatedByViewModelResult, true);
                }
                catch (Exception ex)
                {
                    Log.Warning("Failed to set the 'DialogResult' exception: {0}", ex);
                    result = false;
                }

                // Support all windows (even those that do not derive from ChildWindow)
                if (!result)
                {
                    Log.Warning("Failed to set the 'DialogResult' property of window type '{0}', closing window via method", TargetWindow.GetType().Name);

                    InvokeCloseDynamically();
                }
                else if (ForceCloseAfterSettingDialogResult)
                {
                    InvokeCloseDynamically();
                }
            }
            else
            {
                InvokeCloseDynamically();
            }
        }